What is wrong with Roxanne's object design for a multiplayer paintball game where teams must have the same gear but different color paintballs?

What is wrong with Roxanne's object design for a multiplayer paintball game where teams must have the same gear but different color paintballs?

• A. Teams must share exactly the same values for all gear.
• B. Teams must have the same properties but can have different values.
• C. Teams must use the same color paintballs.
• D. Teams must have opposite helmets.

Answer: (B)

The main idea is that all teams should share the same structure for their gear, but the actual state can differ. In practical terms, you define a gear type with a fixed set of properties (such as helmet, vest, and a color attribute for the paint) and then create instances for each team. Those instances have the same properties, but the values can vary—so one team’s paintball color can be blue while another’s is red. This lets the gear be consistently designed (same properties) while still allowing the color variation the game requires. If you required exactly the same values for all gear across teams, there would be no room to change the paint color, which contradicts the need for different color paintballs. The idea that teams must use the same color paintballs or have opposite helmets introduces constraints that aren’t necessary for the given scenario.

The main idea is that all teams should share the same structure for their gear, but the actual state can differ. In practical terms, you define a gear type with a fixed set of properties (such as helmet, vest, and a color attribute for the paint) and then create instances for each team. Those instances have the same properties, but the values can vary—so one team’s paintball color can be blue while another’s is red. This lets the gear be consistently designed (same properties) while still allowing the color variation the game requires.

If you required exactly the same values for all gear across teams, there would be no room to change the paint color, which contradicts the need for different color paintballs. The idea that teams must use the same color paintballs or have opposite helmets introduces constraints that aren’t necessary for the given scenario.